Prerna Tower, Road No 2, Contractors Area, Bistupur, Jamshedpur , Tel (0657) , PART II CHEMISTRY

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1 R Prerna Tower, Road No, Contractors Area, Bistupur, Jamshedpur , Tel (0657)189, IIT JEE 01 Chemistry Paper II PART II CEMISTRY SECTIN I : Single Correct Answer Type This Section contains 8 multiple choice questions. Each question has four choices (A), (B), ( C) and (D) out of which NLY NE is correct. 1. Ni {P(C 5 ) (C 6 5 )} exhibits temperature dependent magnetic behaviour (paramagnetic / diamagnetic).the coordination geometries of Ni + in the paramagnetic and diamagnetic states are respectively (A) Tetrahedral and tetrahedral (B) Square planar and square planar (C) Tetrahedral and square planar (D) Square planar and tetrahedral 1. (C) Ni + = [Ar] 18 3d 8 4s 0 If it is paramagnetic it should be sp 3 If it is diamagnetic it should be dsp. The reaction of white phosphorus with aqueous Na gives phosphine along with another phosphorus containing compound. The reaction type ; the oxidation states of phosphorus in phosphine and the other product are respectively. (A) Redox reaction ; 3 and 5 (B) Redox reaction ; + 3 and + 5 (C) Disproportionation reaction ; 3 and + 5 (D) Disproportionation reaction ; 3 and NNE P Na P Na P 3. In the cyanide extraction process of silver from argentite ore, the oxidizing and reducing agents used are (A) and C respectively (B) and Zn dust respectively (C) N 3 and Zn dust respectively (D) N 3 and C respectively 3. (B) 4Na S +5 (.A) + Na S 4 + 4Na + S NaAg(CN) + Zn (R.A.) Na Zn (CN) 4 + Ag xygen to oxidise and Zn to reduce. IIT JEE 01 (08 Apr 1) Question & Solutions Paper II 1 www. prernaclasses.com

2 4. The compound that undergoes decarboxylation most readily under mild condition is (A) C C C (B) C (C) C C (D) C C 4. (B) β keto acid decarboxylates easily. 5. Using the data provided, calculate the multiple bond energy (kj mol 1 ) of a C C bond in C. That energy is (take the bond energy of a C bond as 350 kj mol 1 ) C(s) + (g) C (g) = 5 kj mol 1 C (s) C (g) = 1410 kj mol 1 (g) (g) = 330 kj mol 1 (A) 1165 (B) 837 (C) 865 (D) (D) C(s) + (g) C C ( ) ( x) = 5 x = The shape of Xe F molecule is (A) Trigonal bipyramidal (B) Square planar (C) Tetrahedral (D) See saw F 6. (D) Xe : F IIT JEE 01 (08 Apr 1) Question & Solutions Paper II www. prernaclasses.com

3 7. The major product of the given reaction sequence is CN 95% S 4 C 3 C C C 3 G eat (A) C 3 C=C C C 3 (B) C 3 C=C CN C 3 (C) C3 C C C C3 (D) C 3 C=C C N C 3 7. (A) C 3 C C C 3 CC3 C=C C CN C 3 8. For a dilute solution containing.5 g of a non volatile non electrolyte solute in 100 g of water, the elevation in boiling point at 1 atm pressure is ºC. Assuming concentration of solute is much lower than the concentration of solvent, the vapour pressure (mm of g) of the solution is (take K b = 0.76 K kg mol 1 ) (A) 74 (B) 740 (C) 736 (D) (A) m = p p s 10 p 18 3 o = s x SECTIN II : Paragraph Type This section contains 6 multiple choice questions relating to three paragraphs with two questions on each paragraph. Each question has four choices (A), (B), (C) and (D) out of which NLY NE is correct. IIT JEE 01 (08 Apr 1) Question & Solutions Paper II 3 www. prernaclasses.com

4 Paragraph for questions 9 and 30 The electrochemical cell shown below is a concentration cell. M M + (saturated solution of a sparingly soluble salt, MX ) M + (0.001 mol dm 3 ) M The emf of the cell depends on the difference in concentration of M + ions at the two electrodes. The emf of the cell at 98 K is V. 9. The solubility product (K sp ; mol 3 dm 9 ) of MX at 98 K based on the information available for the given concentration cell is (take.303 R 98 / F = V) (A) (B) (C) (D) (B) = log[ M ] + log = log M = M + M + = 10 5 X = 10 5 K sp = The value of G (kj mol 1 ) for the given cell is (take 1 F = C mol 1 ) (A) 5.7 (B) 5.7 (C) 11.4 (D) (D) G = = 11.4 Paragraph for questions 31 and 3 Bleaching powder and bleach solution are produced on a large scale and used in several household products. The effectiveness of bleach solution is often measured by iodometry ml of household bleach solution was mixed with 30 ml of 0.50 M KI and 10 ml of 4 N acetic acid. In the titration of the liberated iodine, 48 ml of 0.5 N Na S 3 was used to reach the end point. The molarity of the household bleach solution is (A) 0.48 M (B) 0.96 M (C) 0.4 M (D) 0.04 M 31. (C) Ca() + Ca() + KI K + I. Moles of Thio = Moles of Iodine = = Moles of = moles of Bleaching powder M = = IIT JEE 01 (08 Apr 1) Question & Solutions Paper II 4 www. prernaclasses.com

5 3. Bleaching powder contains a salt of an oxoacid as one of its components. The anhydride of that oxoacid is (A) (B) 7 (C) (D) 6 3. (A) Bleaching powder is Ca() + Paragraph for questions 33 and 34 In the following reaction sequence, the compound J is an intermediate. ( C C ) ( i ), Pd / C I 3 J K C CNa 3 ( ii ) S ( iii ) anhyd. Al 3 J(C 9 8 ) gives effervescence on treatment with NaC 3 and a positive Baeyer s test 33. The compound K is (A) (B) (C) (D) 33. (C) Ph C Perkin's Ph C = C C (J) Reaction (I) nd step C C (R) C IIT JEE 01 (08 Apr 1) Question & Solutions Paper II 5 www. prernaclasses.com

6 34. The compound I is C3 (A) (B) (C) (D) 34. (A) Ph C Perkin's Ph C = C C (J) Reaction (I) nd step C C (R) C SECTIN III : Multiple Correct Answer(s) Type This section contains 6 multiple choice questions. Each question has four choices (A), (B), (C) and (D) out of which NE or MRE are correct. 35. With respect to graphite and diamond, which of the statement(s) given below is (are) correct? (A) Graphite is harder than diamond. (B) Graphite has higher electrical conductivity than diamond. (C) Graphite has higher thermal conductivity than diamond. (D) Graphite has higher C C bond order than diamond. 35. (BD) Diamond has higher thermal conductivity than diamond. 36. The given graphs / data I, II, III and IV represent general trend observed for different physisorption and chemisorption processes under mild conditions of temperature and pressure. Which of the following choice(s) about I, II, III and IV is (are) correct? I P constant II P constant III IV 00 K 50 K 0 Eads Distance of molecule from the surface ads = 150kJmol 1 T T P (A) I is physisorption and II is chemisorption (B) I is physisorption and III is chemisorption (C) IV is chemisorption and II is chemisorption (D) IV is chemisorption and III is chemisorption 36. (AC) IIT JEE 01 (08 Apr 1) Question & Solutions Paper II 6 www. prernaclasses.com

7 37. The reversible expansion of an ideal gas under adiabatic and isothermal conditions is shown in the figure. Which of the following statement(s) is (are) correct? (P1,V1,T1) isothermal P adiabatic (P,V,T) (P 3,V,T 3) V (A) T 1 = T (B) T 3 > T 1 (C) w isothermal > w adiabatic (D) U isothermal > U adiabatic 37. (ACD) For Isothermal T 1 = T For adiabatic T 3 is less than T 1. Greater Area is for isothermal process. U = 0 for isothermal but U decreases for adiabatic process. 38. For the given aqueous reactions, which of the statement(s) is (are) true? excess KI + K 3[Fe(CN) 6] dilute S4 brownish yellow solution ZnS4 white precipitate + brownish yellow filtrate NaS3 colourless solution (A) The first reaction is a redox reaction. (B) White precipitate is Zn 3 [Fe(CN) 6 ]. (C) Addition of filtrate to starch solution gives blue colour. (D) White precipitate is soluble in Na solution. 38. (ACD) ZnS KI + K 3 [Fe(CN) 6 ] K 4 [Fe(CN) 6 ] + I 4 Zn [Fe(CN) 6 ] + KI 3 IIT JEE 01 (08 Apr 1) Question & Solutions Paper II 7 www. prernaclasses.com

8 39. With reference to the scheme given, which of the given statement(s) about T, U, V and W is (are) correct? C3 T + LiAl 4 excess (C3C) Cr3 / V U W (A) T is soluble in hot aqueous Na (B) U is optically active (C) Molecular formula of W is C (D) V gives effervescence on treatment with aqueous NaC (ACD) C 3 C anhydride Ester C C Cr 3 / + acid 40. Which of the given statement(s) about N,, P and Q with respect to M is (are) correct? C3 M C3 N C 3 C3 P C3 Q (A) M and N are non mirror image stereoisomers (B) M and are identical (C) M and P are enantiomers (D) M and Q are identical 40. (ABC) C 3 (M) C3 (N) C 3 () C 3 (P) C3 (Q) IIT JEE 01 (08 Apr 1) Question & Solutions Paper II 8 www. prernaclasses.com